package com.itheima.reggie.filter;

import com.alibaba.fastjson.JSON;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.AntPathMatcher;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebFilter(filterName = "loginCheckFilter", urlPatterns = "/*")
@Slf4j
public class LoginCheckFilter implements Filter {

    public static final AntPathMatcher PATH_MATCHER = new AntPathMatcher();

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;

        String requestURI = request.getRequestURI();
        String[] urls = new String[]{
                "/employee/login",
                "/employee/logout",
                "/backend/**",
                "/front/**",
                "/user/sendMsg",
                "/user/login"
        };
        boolean check = check(urls,requestURI);
        //是否能匹配到直接放行的路径
        if(check) {
            log.info("直接放行的路径，{}",requestURI);
            filterChain.doFilter(request, response);
            return;
        }
        //员工登录检查
        if (request.getSession().getAttribute("employee") != null) {
            log.info("有已经登陆的用户信息");
            Long empId = (Long) request.getSession().getAttribute("employee");
            BaseContext.setValue(empId);
            filterChain.doFilter(request, response);
            return;
        }
        //用户登录检查
        if (request.getSession().getAttribute("user") != null) {
            log.info("有已经登陆的用户信息");
            Long UserId = (Long) request.getSession().getAttribute("user");
            BaseContext.setValue(UserId);
            filterChain.doFilter(request, response);
            return;
        }



    }

    /**
     * 路径匹配检查
     * @param urls
     * @param requestURI
     * @return
     */
    public boolean check(String[] urls, String requestURI) {
        for (String url:urls) {
            boolean match = PATH_MATCHER.match(url,requestURI);
            if (match){
                return true;
            }
        }
        return false;
    }
}
